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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1601 (Vibration Symptoms Diagnosis And Correction) >> Diagnostic Information and Procedures >> Tire and Wheel Assembly Runout Measurement - Off-Vehicle >> Wheel Runout Measurement-Tire Dismounted

Wheel Runout Measurement-Tire Dismounted

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. On the tire and wheel assembly, or assemblies with wheel runout measurements-tire mounted-which were NOT within specifications, mark each tire and wheel in relation to each other.
  2. Dismount the tire from the wheel. Refer to TIRE MOUNTING AND DISMOUNTING .
  3. Mount the wheel on a spin-type wheel balancer.
  4. Locate the wheel on the balancer with a cone through the back side of the center pilot hole.
    Fig 1: Position Dial Indicator On Horizontal Inner Surface Of Wheel Rim Flange
    G02708571Courtesy of GENERAL MOTORS CORP.
  5. Position the dial indicator on the horizontal inner surface of the wheel rim flange-with the tire dismounted-such that the dial indicator is perpendicular to the rim flange surface. Wheel runout should be measured on both the inboard and outboard rim flanges. Ignore any jumps or dips due to paint drips, chips, or welds.
  6. Slowly rotate the wheel one complete revolution in order to find the low spot.
  7. Set the dial indicator to zero at the low spot.
  8. Slowly rotate the wheel one more complete revolution and measure the total amount of wheel radial runout.

    Specification 

    • Maximum aluminum wheel radial runout-measured off-vehicle, tire dismounted: 0.762 mm (0.030 in)
    • Maximum steel wheel radial runout-measured off-vehicle, tire dismounted: 1.015 mm (0.040 in)
    Fig 2: Position Dial Indicator On Vertical Inner Surface Of Wheel Rim Flange
    G02708572Courtesy of GENERAL MOTORS CORP.
  9. Position the dial indicator on the vertical inner surface of the wheel rim flange-with the tire dismounted-such that the dial indicator is perpendicular to the rim flange surface. Wheel runout should be measured on both the inboard and outboard rim flanges. Ignore any jumps or dips due to paint drips, chips, or welds.
  10. Slowly rotate the wheel one complete revolution in order to find the low spot.
  11. Set the dial indicator to zero at the low spot.
  12. Slowly rotate the wheel one more complete revolution and measure the total amount of wheel lateral runout.

    Specification 

    • Maximum aluminum wheel lateral runout-measured off-vehicle, tire dismounted: 0.762 mm (0.030 in)
    • Maximum steel wheel lateral runout-measured off-vehicle, tire dismounted: 1.143 mm (0.045 in)
  13. Repeat steps  2 through  12 until all of the wheel radial and lateral runout measurements-tire dismounted-have been taken on each wheel with runout measurements-tire mounted-which were NOT within specifications.
  14. If any of the wheel runout measurements-tire dismounted-were NOT within specifications, replace the wheel. Always measure the runout of any replacement wheels.
  15. For any of the wheel runout measurements which WERE within specifications, while the-tire and wheel-assembly runout measurements were NOT within specifications, replace the tire, then balance the assembly. Refer to Tire and Wheel Assembly Balancing - Off-Vehicle  .
  16. Using the matchmarks made prior to dismounting the tire, or tires, mount the tire, or tires to the wheel, or wheels, then balance the assembly, or assemblies. Refer to Tire and Wheel Assembly Balancing - Off-Vehicle  .

    Always measure the runout of any of the tire and wheel assemblies which have had the tires dismounted and mounted.

  17. Using the matchmarks made prior to removal, install the tire and wheel assemblies to the vehicle. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION .
  18. Lower the vehicle.
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